| ## Some maintenance tools |
| |
| ### How to use `kill -s SIGUSR2 $pid` |
| |
| The first time you execute `kill -s SIGUSR2 $pid`, will see the following help information from the log output, including: |
| 1. Clear the local router cache |
| 2. Turn on/off simple output of the response log |
| 3. Output in-memory metrics, router cache, and memory state information of important objects to local files |
| |
| Follow the help information to execute |
| |
| ``` |
| - -- HoraeDBClient Signal Help -- |
| - Signal output dir: /Users/xxx/xxx |
| - |
| - How to clear route cache: |
| - [1] `cd /Users/xxx/xxx` |
| - [2] `touch clear_cache.sig` |
| - [3] `kill -s SIGUSR2 $pid` |
| - [4] `rm clear_cache.sig` |
| - |
| - How to open or close read/write log(The second execution means close): |
| - [1] `cd /Users/xxx/xxx` |
| - [2] `touch rw_logging.sig` |
| - [3] `kill -s SIGUSR2 $pid` |
| - [4] `rm rw_logging.sig` |
| - |
| - How to open or close rpc limiter(The second execution means close): |
| - [1] `cd /Users/xxx/xxx` |
| - [2] `touch rpc_limit.sig` |
| - [3] `kill -s SIGUSR2 $pid` |
| - [4] `rm rpc_limit.sig` |
| - |
| - How to get metricsădisplay info and route cache detail: |
| - [1] `cd /Users/xxx/xxx` |
| - [2] `rm *.sig` |
| - [3] `kill -s SIGUSR2 $pid` |
| - |
| - The file signals that is currently open: |
| - rpc_limit.sig |
| - |
| ``` |
